Hi JP,
John asked me to post this for him:
Dear JP
Thanks for the suggestion, but i think I,ll stay with what I know best, (buildings and scenery).
Have you tried trying to source trains and wagons from a model railway outlet I'm sure there is an 'O' gauge or 'G' gauge scale that is pretty close to 54mm and may be suitable.
Sorry but I definitely won't be getting into rolling stock.
JG